gistfile1.txt

    protected function triggerListeners($event, EventInterface $e, $callback = null)
    {

        $responses = new ResponseCollection;
        $listeners = $this->getListeners($event);

        // Add shared/wildcard listeners to the list of listeners,
        // but don't modify the listeners object
        $sharedListeners         = $this->getSharedListeners($event);
        $sharedWildcardListeners = $this->getSharedListeners('*');
        $wildcardListeners       = $this->getListeners('*');
        if (count($sharedListeners) || count($sharedWildcardListeners) || count($wildcardListeners)) {
            $listeners = clone $listeners;

            // Shared listeners on this specific event
            $this->insertListeners($listeners, $sharedListeners);

            // Shared wildcard listeners
            $this->insertListeners($listeners, $sharedWildcardListeners);

            // Add wildcard listeners
            $this->insertListeners($listeners, $wildcardListeners);
        }

        foreach ($listeners as $listener) {
            $listenerCallback = $listener->getCallback();

            ////////////////////////////////////////////////////////////
            if ($event = 'pickAddressesAction.validate') {
                $callbacks[] = $listenerCallback;
            }
            ////////////////////////////////////////////////////////////

            // Trigger the listener's callback, and push its result onto the
            // response collection
            $responses->push(call_user_func($listenerCallback, $e));

            // If the event was asked to stop propagating, do so
            if ($e->propagationIsStopped()) {
                $responses->setStopped(true);
                break;
            }

            // If the result causes our validation callback to return true,
            // stop propagation
            if ($callback && call_user_func($callback, $responses->last())) {
                $responses->setStopped(true);
                break;
            }
        }

        ///////////////////////////////////////////////////
        if (isset($callbacks)) {
            echo "<pre>";
            var_dump($callbacks);
            die();
        }
        ///////////////////////////////////////////////////

        return $responses;
    }